Sheet-metal-bending machine



C. B. WEAVER.

SHEET METAL BENDING MACHINE.

APPLICATION FILED FEB-13. I918.

Patented July 19, 1921.

UNITED STATES PATENT. OFFICE.

cLAYroN n. WEAVER, or P I ADELPHI PENNSYLVANIA, AssmNoR .ro EDWARD G. BUDD MANUFACTURING oouPANv, or PHILADE PHIA, PENNSYLVANIA, A

CORPORATION OF PENNSYLVANIA.

SHEET-METAL-BENDING NACHINE.

Application filed February To all whom it may concern Be it known that I, CLAYTON B. WnAvnR, a citizen of the United States, resldlng at Philadelphia, in the county of Philadel hia and State of Pennsylvania, have ma e a certain new and useful Invention in Sheet- Metal-Bending Machines.

This invention relates to machines for bending sheet metal.

The object of the invention is to provide a machine of the class described which is simple in structure, eflicient in operation, economical of manufacture.

A further object ofthe invention is to provide a manuall operated machine for bendin sheet metal:

urther objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction,combination, location and relative rrangement of parts, all as will be more fully hereinafter set forth, as shown in the accompanying drawing and finally sheet metal is handled and'must be bent or turned atportions thereof through a desired degree of bending or turning, it has heretofore been the custom to bend the same as near as possible to the desired point by manual labor or improvised tools for that purpose. Where sheet metal of any large degree of thickness is employed, the labor necessary to bend the same is necessarily increased, making the task a particularly laborious one.

It is among the special purposes of my present invention to provide a machine which is positive in its action to the extent of insuring the bending of the sheet metal on the proper line thereof, and which requires but little manual effort to secure the bending effect. In accordance with my invention I provide what I will call a frame Specification of Letters Patent.

Patented July 19, 1921. 13, 1918. Serial No. 218,945.

1 comprising longitudinal strips 2 and transverse or cross strips '3 secured thereto.

\ The frame may be supported in any suitable manner, for example, by means of legs 4. The sheet metal to be bent is received on the top surface of the frame 1. The ends of the frame are provided with arms 5 to wh ch Is secured in any suitable manner, for example, by means of bolts 6, a spring bar 7. If desired, and as shown, a wedge 8 may be interposed between the end of the spring bar 7, and the arm 5 to insure a space between the frame 1 and the bar 7 and to allow a limited degree of movement between the bar 7 and the frame 1, as clearly shown in F ig. 2.

ecured to the top 'of the frame 1 and at the front thereof is a pivoted yoke 9, which is provided with a projection 10, adapted to engage in a groove 11, in the free end of the bar 7. The sheet of metal 12 is placed on the table or top surface of the frame 1 with the ends thereof positioned under the spring bar 7. Guides 13 secured to the arms '5 Insure the proper positioning of the sheet metal 12on the frame 1. When the sheet has been properly positioned the pivotedmember 9 isrocked into'position shown in dotted lmes, Fig. 2, with the projection 10 on the inner face of the yoke member9 enaglng in the groove 11 in the spring bar 7.

his clamps and holds through the medium of the springbar 7, the sheet metal 12 in place on the frame 1. Pivotally hinged to the bar 7' by means of brackets 14, is what I will term a presser bar 15, to which is secured a handle 17,, preferably heavily weighted at its end, as shown. After the sheet metal has been positioned on the frame 1 and locked in place by means of the pivoted yoke 9, the handle 17 is turned from the position shown at the right hand end of Fig. 1, to the position shown at the left hand end of Fig. 1, whereby the metal is bent to its desired degree of curvature on the ends of frame 1, as will be readily understood, to allow the full movement of the presser bar 15. It should be noted that I prefer the use of the goose neck hin es 14 as shown more clearly in Fig. 3. t will also be observed that the pivoted yoke 9 in addition to securing the sheet metal 12 in place formsa front limit for the edge of the metal to be bent and thus effectively aid as a gage for the proper positioning of the sheet metal on the frame 1.

It will be undeistood that while I have shown my invention as applied for bending the ends of a sheet of metal, which in this instance, is in the form of a cowl structure for automobiles wherein the ends of the sheet metal only are bent, that, with but slight modification, the invention can be equally well applied for bending any type or shape of sheet metal. Therefore, while I combination with a frame, upon which the metal sheet is adapted to be received, with the end thereof extending beyond the end of the frame, and a bar fixed on and extending above and transversely across the frame .adjacent the end thereof, and beneathand beyond which the end of the metal sheet extends, of a presser bar positioned above and parallel to and pivotally mounted on said first mentioned bar, and means for rocking said presser bar.

2-. In a sheet metal bending machine, the combination with a frame upon which the metal sheet is adapted to be received, with the end thereof extended beyond the end of the frame, and a bar of spring material to permit the same to yield, said spring bar extending above and transversely across the frame adjacent the end thereof and bolted at its ends to said frame, the end of the metal sheet to be bent extending beneath said bar and beyond the end of the frame, of a presser bar positioned above and parallel to said first mentioned bar and pivotally hinged thereto, said presser bar having an operating handle.

3. In a sheet metal bending machine, the

tends and a clamp device pivotally mounted on said frame and arranged to engage said bar to clamp the metal sheet in place, of a presser bar positioned above and parallel to said first mentioned bar and pivotally hinged thereto said presser bar having an operating handle.

4. In a sheet metal bending machine, the combination with a supporting frame, of a retaining and guiding bar of spring material, mounted on and extending above and transversely across said frame adjacent the end thereof and bolted at its ends thereto, and between which and said frame theend of the metal sheet extends, a yoke member pivotally mounted on the frame to guide the sheet to be bent, said yoke engaging said bar, a presser bar positioned above and parallel to said first mentioned bar and pivotally hinged thereto, said presser bar having a weighted operating handle.

5. In a. sheet metal bending machine, the combination with a supporting frame, of a retaining and guiding bar of spring material, mounted on and extending above and transversely across said frame ad'acent the end thereof, and bolted at its-'ends thereto, and between which and said frame the end of the metal sheet extends, a yoke member pivotally mounted on the frame to guide the sheet. to be bent, said yoke engaging said bar, a presser bar positioned above and parallel to said first mentioned bar, goose-neck hinge connections between said presser bar and said retaining and guiding bar to permit the presser bar to rock or swing over and below the edge of said retaining bar and an operating handle for said presser bar.

In testimony whereof I have hereunto set my hand on this 8th day of February A. D., 1918.

CLAYTON B. WEAVER. 

